US1168898A

US1168898A - Portable grain-elevator.

Info

Publication number: US1168898A
Application number: US45106308A
Authority: US
Inventors: George B Nelson
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-08-31
Filing date: 1908-08-31
Publication date: 1916-01-18
Anticipated expiration: 1933-01-18

Description

G. B. NELSON. PORTABLE GRAIN ELEVATOR. APPLICATION man AUG-3|, 1908.

Patented J an. 18, 1916.

6 SHEETS-SHEET l- WM ova o3 \E fl a t E Q by :3 n Qt P9 P2 5 fi 3 Mg I 1 M e e. v Ex ht :i Q: Q\\ Q R 4 mg \l 8 8Q NQ Q\ WIN? Q\ o 0.0 m N o o I U; a wk on a u an i a o 0 o o 0 e l I: I l a 2 W I B wm\ \Q$\ o wx 1945K! O M @Q m B wiihesses v v THE COLUMBIA PLANOGRAPH '60., WASHINGTON, D. C-

G. B. NELSON.

PORTABLE GRAIN ELEVATOR.

APPLICATION FILED AUG.3I, 1908. JaIL'IS,

6 SHEETS-SHEET 2.

Inuenizr THE COLUMBIA PLANOGRAPH co., WASHINGTON. D. c.

G. B. NELSON.

PORTABLE GRAIN ELEVATOR.

APPLICATION FILED AUG.3I, 190a.

Patented Jan. 18, 1916.

6 SHEETS-SHEET 3.

THE COLUMBIA PLANOGRAPH C0,, WASHINGTON. D. c.

G. B. NELSON.

PORTABLE GRAIN ELEVATOR.

APPLICATION 'HLED AUG.31, 1908.

Patented J an. 18, 1916.

a SHEETS-SHEET 4.

G. B. NELSON.

PORTABLE GRAIN ELEVATOR.

APPLICATION FILED AUG-31, 190s.

Patented Jan. 18, 1916.

5 SHEETS-SHEET 5.

THE coLUMBlA PMNOURAPH cm, WASHINGTON, D- C G. B. NELSON.

PORTABLE GRAIN ELEVATOR. APPLICATION FILED AUG.31. lso's.

Patented Jai1.18,1916.

6 SHEETS-SHEET 6- Tm! COLUMBIA PLANOGRAPII 20., WASHINGTON, D. c.

--s.. is. is.

GEORGE B. NELSON, F PUEDFIELD, IU'WA.

PORTABLE G'RAIliT-ELEVATGE.

messes.

To all whom it may concern: a I

Be it known that I, GEORGE E. 'Nnnsoiv,' a citizen of the United States, residing at RGdfiGlCl, in the county of Dallas and State of Iowa, have invented a certain new and useful Portable Grain-Elevator, of which the following is a specification.

he object of my invention is to provide a grain elevatorof simple, durable and inexpensive construction in which the entire mechanism for unloading a wagon and for discharging. the contents thereof into an elevated bin or receptacle is contained wholly upon the supporting trucks and all of the so that the device may be quickly and easily moved upon its own supportingwheels from place to place and maybe quickly adjusted to position taching any of the it. further object this kind which may be successfully and easily operated when restinguponits-own suppo ting wheels on the ground level.

A ifm-therobject is to provide a portable grain elevator with means whereby the wagon may be moved to tilting position and the grain conveyor operated. by power clerived from av tread mill which is operated by the draft animals that are attached to the wagon that is being dumped and without the necessity ofiin way detaching iitching th draft animals from the ti at being dumped, thus dispens- 1 the necessi y of providing an auxiliary engine for operating the device and also avoiding the necessity of unhitching the draft animals.

A. further object is to provide a device of this kind which may be quickly and easily folded into compact form to rest upon the main sup iorting frame of the device.

A. further object is to provide an improved folding conveyor for a portable rain elevator which folding conveyor is of mple, durable and inexpensive construction. g'iermanently attached to the machine frame, and capable of being quickly and easily adjusted to various angles as reo uired for delivering grain into elevated. bins or r:..=cent:icle.!. and also so arranged that it 1' he quit .i and easily moved from its ed to itswfolded parts thereof.

in av Specification of Letters Patent.

parts are permanently connected together,

for use without'detaching or at is to provide a device of position and when in improved means for automatically return-' ing both the wagon platform and the tread mill platform to horizontal position in aline-- me'nt with each other after the load has been discharged and for controlling said movements to prevent unnecessary shock and ar to the machine.

Other parts will appear hereinafter in the description.

My invention consists in the construction,,

arrangement and combination of the various parts of the device whereby the ObJects contemplated are attained, ashereinafter more fully set forth, pointed out in my claimsandillustrated in the accompanying drawings', in which- Figure 1 shows a side elevation of the" completemachine embodyingmy invention with the parts in their folded positions ready for transportation. Fig. 2 shows a top or plan View of same. Fig. 8 shows a centrallongitudinalsectional view of the complete machine embodying my invention with the parts in their extended or unfolded position ready for use. The dotted lines in said figure show both the tread power platform and the wagon platform in their tilted positions. of same with the parts in their extended position ready for use. Fig. 5 shows a rear end elevation of the complete device with the various parts extended ready for use.

Said view particularly illustrates the position of the elevator chute and'connected arts. Fig. 6 shows a detail front elevation of the forward portion of the main frame to illustrate the mechanism for rigidly supporting the main frame when in use as a grain elevator. Fig. 7 shows a vertical central sectional view on the line 7-7 of Fig. 6. Fig. 8 shows an enlarged detail sectional view illustrating the connection between the outer end of the conveyor frame and the beam of the supporting wheels Patented Jan. 18, 1.9116. Application filed August 31, 1908. Serial No. 451,063.

Fig. l shows a top or plan viewprising a bolster 12 thereof. Fig. '9 shows a sectional view'on the line 9.9 of Fig. 8. Fig. 10 shows a sectional view on the line 10 10 of Fig. 8. Fig. 11 shows an enlarged detail side view of a portion of the movable platform of the tread power device. verted plan view of same. Fig. 13 shows an enlarged detail view illustrating the fric-.

tion device for manually stopping themovement of the movable tread platform and also the automatic brake device for stopping the movement of said platform when it is traveling at .a high speed. F ig. 14

shows a sectional view on the line 1%14 of Fig. 13. Fig. 15 shows an enlarged detail VlGW illustrating the means for manually holding the tread power platform against tilting movements and also the means for automatically preventing the rear end of the tilting tread power platform from moving downwardlyafter it has been released to tilt to a horizontal position so that the draft animals may pass off of it and so'that when the wagon strikes it it will not tilt. Fig-16 shows an edge view of same. Fig. 17 shows an enlarged sectional view illustrating the neans for controlling the movementof the shaft that raises and lowers the wagon platform. Fig. 18 shows a side view of same. Fig. 19 shows a detail sectional view of the receiving end of the grain delivering conveyer. leg. 20 shows a longitudinal sectional view .of the delivery end of same with the delivery spout in position adjacent thereto. Fig. 2i shows a front elevation of the grain discharging conveyor with the conveyor chute in its folded position. Fig. 22 shows. a detail view illustrating the means for supporting the forward end of the grain conveyer on the main frame of the machine for tation, said view also illustrating the truck of the grain conveyor frame in its folded shows an enlarged detail for elevating the wagon platform. Fig. 2a shows a sectional View on the line 24-24 of Fig. 23, and Fig. 25 shows an enlarged detail View illustrating the means for securing the wagon platform in its horizontal position. i

Referring to the accompanying drawings.

Ihave used the reference numeral 10 to indi cate the main frame of the device. This frame is supported at its rear end upon the wheels 11 and at its front end is a truck compivotally connected by means of the bracket 13'with the frame 10 so that the ends of the bolster may tilt up and down relative to the main frame. Extended through each end of the bolster is a screw threaded upright 14: having a wheel 15 -mounted in its lower end and also having mounted on it'between the main frame and the bolster a screw threaded hand wheel 16.

Fig. 12' shows an in-- purposes of. transpor messes Connected with the lower portion of each of the uprights 14 is a forwardly projecting rm 1'? and said arms are connected by means of a link 18. The tongue 19 is connected by a pin 20 with the bolster 12- and also by a pin 21 with the link 18. By this arrangement and assuming that the hand wheels 16 are at their lower limit of movement, then the device may be advanced in the'ordinary way by draft animals and it will be steered by the tongue connected with the link 18. The bolster will be permitted to tilt laterally to accommodateinequalities of wagon to be driven up over it onto the machine and in another position of being folded over the top "of the machine. At the forward end of the machine frame is a second.

platf rm 23 of the same kind to permit the wagon to be driven from the machine.

1 J! 1 At the rear portion of the top or tne machine 1s a, tilting platform 24 having two rearwardly extending portions 25. V The part 24 is designed to receive the forward wheelsof a wagon and the extensions 25 are designed to receive the rear wheels thereof. The space between the extensions 25 is filled by means of a fixed or platform is also covered by stationary side pieces 27. The tilting platform 24 is mounted upon'the shaft 28 and the arrangement of the tilting platform relative to the stationary portions is such that when a wagon is driven on top of the machine the rear wheels will rest on the rear extensions 25. Then when theplatform 24 is tilted the stationary parts rear wheels. will prevent the wagon from moving laterally or rearwardly, so that it is not necessary to provide other means for holding the wagon to the tilting platform and the rear axle of the wagon will rest upon the stationary parts 26 and 27 when the platform is in a tilted position and which obviously provides a stop to limit the tilted position of the platform. I have provided means for lockin the tilting platform 2% in stationary platform '26 and the top of the machineoutside of the tilting 26 and 27 surrounding the i l l l r I l platform from said crank arm, I have provided a bar 30 having a limited sliding connection with the crank arm and also connected to the lever 31. i'Vhen said lever is moved forwardly the crank arm will be moved rearwardly and withdrawn frombeneath the tilting platform, thus permitting the rear end of the tilting platform to move downwardly. 1 preferably provide a. spring 32 to normally engage said crank arm and yieldingly hold it in position under thetilting platform. a

A considerable amount of power is required for raising the tilting platform with a loaded wagon on it and it is desirable that this platform be raised slowly. It is also desirable that when the tilting platform is lowered it may be moved quickly. I have, therefore provided the following described mechanism for raising and lowering the platform: Referring to Figs. 3, 2-3 and 24,

I have used the reference numeral 33 to in dicate a stationary bracket having a vertical shaft 84 rotatably mounted in it. This shaft is screw threaded and on its lower end is a sprocket wheel 35. Mounted upon the shaft 34 is a screw threaded block 36. This block is mounted within anupright frame 37 and is lined to said frame by means of the screws 38. The upper end of the frame 87 is pivoted to a bracket 39 attachedto the end surface of the forward end of the tilting platform. By this arrangement it is obvious that when the screw shaft 34 is rotated in one direction the block 36 will be elevated and the forwardend 'of the platform will be 7 raised. A reverse movementof the shaft 34 will res'ult in lowering the forward end of the purpose of relieving the screw of allthe tilting platform. Arranged along the right side of the machine frame is a shaft 40; :Fixed to the shaft40 are two cones, a 1

small one 41 and a large one 42. Mounted adjacent to 'the

cones

41 and 42 is an upright shaft 43 having two small cones thereon 44 and 45, the former being'designed for engagement with the small cone 41 and the latter with the large cone 42. Said shaft is mounted in a bracket 46 fixedto the side of the machine frame and is so arranged that it has a limited lateral movement therein. A lever 47 is fulcrumed to the top of the bracket 46 and is connected to the shaft 43. The inner end of said lever is pivotally con nected to a rod 48, which rod is connected to the bar 30. On the lower end of the shaft 4-3 is a sprocket wheel 49 connected by the sprocket chain 50 with the sprocket wheel 35. By this arrangement of parts it is obvious that when the lever 31 is moved forwardly to the position where it must stand in order to release the rear end of the tilting platform, and the small cone 41 being in engagement with the cone 44, the shaft 40 is at the same time rotated by means hereinafter described, whereby the shaft 43 will be rotated at comparatively slow speed and this" will cause the screw 84 to be turned and the forward end of the tilting platform to be elevated. Then when the lever 31 is moved rearwardly, the cone 42 will be in engagement with the cone 45 and the shaft will be rotated rapidly and in the direction re- 5 quired for returning the tilting platform to horizontal position, and after the tilting platform is thus returned it will be held in its horizontal position by the crankshaft 29 as before described.

As the lever 31 is moved rearwardly for returning the tilting platform to horizontal position the arm of the crank shaft 29 engaged by the beveled edge 25, on the eX- tensions 25 (shown in Fig. 25), asa result of which ,saidextensions move upwardly past said crank shaft, while the connecting bar 30 is allowed to move rearwardly because of the slot connection with said crank shaft, (shown in Fig. 25). From this it will be seen that while tie bar 30 is moved rearwardly sufliciently to throw the elevating mechanism into operation, the crank shaft 29 j is held against returning to its normal position because of the bevel edge 25 on the ex- 1 tensions 25 until after said extensions have passed the crank shaft in their upward movement, when said crank shaft. is .by means of the spring 32 forced outwardly and supports said extension from the under side. y

This tiltingplatform is also firmly and immovably held in any position of its adjustment by the screw 34 and hence it cannot tilt in any direction until the said screw is'rotated. The crank shaft 29 is-simply for strains when a wagon is moving to position on the platform or moving off of it. Ar-

ranged at opposite sides of the platform 24 are two hinged side-boarcs 51 and 52 capable of folding to position over the tilting platform when not in use and of standing in upright positions when in use to form a guide-way for the draft animals and the wagon.

In the rear of the tilting platform is a small hinged door 53 so arranged that when open it will stand in an upwardly and rearwardly inclined position and pcrmitthe contents of the wagon on thetilting platform to be dumped into theopening which said door covers to enter the conveyer located beneath the door 53 as hereinafter described.

In front of the wagon platform is a'second tilting platform 54 mounted upon the shaft 55. Said tilting platform 54 is prowill be rotated.

on it would warrant.

tween each pair ofthe shafts 56 is a plat form cross piece 59 fixed to the links 57 at their ends and to the shafts 56 at their central portions by means of the brackets 60. Sand shafts are also provlded with rollers 61 at their central portions. These rollers wheels 63. The sprocket wheels 65 on the I shaft 64 are simply idlers. On one end of the. shaft62 is a sprocket wheel 66 connected by a sprocket chain 67 with the sprocket wheel 68, the latter being fixed to the shaft 69 rotatably mounted in the machine frame as shown in 2. By this arrangement it is obvious that when the rolling platform is advanced the shaft 69 Adjacent to the shaft 69 is a short shaft 70 connected to the shaft 69 by the gear wheels 71 and 72 in mesh with each "other, The shaft 70is connected with the shaft 4L0by means of two beveled pinions 73 and i't. Mounted upon the shaft 70 is a large pinion 75 in mesh with a smaller idler pinion 76, the latter being in mesh with a still smaller pinion 77 fixed to the shaft 78. This shaft 78 has a hub 7 9 fixed vthereon and having'radial arms 80 fixed.

thereto. On the radial arms 80 are the brake levers 81. These brake levers are arranged within ELShLlhlOllfilj/ rim 82 fixed to the machine frame, said parts being so, an :ranged that when the shaft 78 1S rotated at high speed, the brake levers 81 will move outwardly by centrifugal force and will engage the stationary 13111182 with sufficient force to stop or at least greatly retard the movement of the shaft By this arrangement the rolling platform is automatically prevented from moving at a speed higher than the safety of the draft animals I have also provided means for manually locking the shaft 78 against'rotation to thereby hold therolling platformagainstmovement as follows: The reference num ral 83 indicates a leverfuh crumedto the machine frame and having a bar 84 pivoted to it. On the other end of the bar 84 is a brake shoe 85 having a tapered opening therein designed to receive the hub 79, hence by moving the upper end of the lever 83 rearwardly, the brake shoe S5 is moved forwardly and the hub 2 9 is wedged therein and prevented, from turning.

In order to successfully operate a tread power of this kind, it is necessary that it be arranged at an angle relatlve to a horizontal line andin order that the draft animale and the wagons may easily pass over it, it must be so arranged that it can be placed in a horizontal position and there held. To provide, therefore, for tilting the platform 54 and for holding it'in diderent positions of its adjustment, I have fixed to the rear end of the platform 54 a segmental rack 86 and at the rear of said rack is a shaft 87 having a pinion 88 fixed thereon in mesh with said rack. Rotatably mounted on the shaft 87 is a band wheel 89 and passed around this band wheel is a hand brake .90 having one end fixed to the sta tionary support and the other end fixed to the lever 91. This lever 91 is connected by means of a rod 92 with a lever 93, hence, when said lever is pulled forwardly at its upper end the lever 91 is moved to position for tightening the band brake upon the band wheel and thus holding the shaft 87 against rotary movement, however, when said hand brake is released the platform is free to tilt in either direction. Fixed to the band wheel 89 is a disk 9% having a series of gravity pawls 95 thereon designed to engage a ratchet wheel 96 which is fixed to the shaft 87. t

In use with this portion of the device and 7 assuming that the band brake is firmly held in engagement with the band wheel 89, then obviously, the shaft 87 cannot rotate in a direction for tilting theplatform because the pawls are in engagement with the ratchet wheel 96 which is fixed to the shaft 87. Then when the draft animals are on the platform the band brake 90 is released, thus permitting the band wheel 89 and the disk 9% to rotate with the ratchet wheel 96 in the direction required for permitting the rear end of the tilting platform to move downwardly. Then when it is de sired to drive the draft animals and wagon from the machine, the movement of the rolling platform is stopped and the draft animals are driven to the forward end of the tread power platform and their weight causes the tread power platform to tilt to a horizontal position; Immediately after this, the front wheels of the wagon will strike upon the rear end of the tilting platform and unless some means wereprovided for automaticallysecuring the tilting platform in its horizontal position it would againtilt. However, by providing the ratchet wheel 96 to the shaft 87 and the combined band wheel and disk 94; with the pawls 95, the shaft 87 is thereby held against such movei'nent as would permit the rear end of the platform to move downwardly, therefore, when the hand brake 90 is loose the tread power platform is free to tilt rearwardly below horizontal position but limitcd in its forward movement to horizontal position, the driving shaft 62 projecting beyond the main frame and thereby acting iiie'asos E as a stop to prevent movement of the platform forwardly below horizontal position. When the band brake is tight, the forward end of the tread power platform may move downwardly to horizontal position but the rear end is automatically locked against downward movement.

The means for handling the grain that is discharged from the rear end of the wagon through the opening c vered by the hinged door 53, comprises the following mechanism: Below the hinged door is a compartment 97 having therein a conveyor 98 which conveyor is driven by means ofa pinion 99 on the shaft l0 in mesh with a pinion 100 on the shaft 101 of the conveyer 98. By this means the material discharged from the wagon is delivered laterally tothe side of the machine. Fixed to the side of the machine frame below the discharge end of the conveyor 98 is a bracket 102 and above the discharge end'of the conveyer is a second bracket 103. Pivoted to the bracket 103 is a hanger 10 1-and attached to this hanger is a frame 105 rotatably supported upon the bracket 102.

Arranged in the frame 105 is a shaft 106 having a sprocket wheel 107 thereon. On the end of the shaft 106 is a beveled pinion 108 which pinion is driven as follows: liotatably mounted upon the frame 105 is a rim 109 having beveled gear teeth 110 at its top in mesh with the beveled pinion 108 and also having beveled teeth 111 at its bottom. The latter gear teeth are arranged in mesh with a pinion 112 which pinion is fixed to a shaft 113 mounted in hearings on the bottom of the bracket 102 and said shaft is driven by power from the shaft 10 as follows:

Fixed to the side of the main frame below the shaft 10 is a counter shaft 11% hav ing two sprocket wheels 115 and 116 fined thereon. The latter is connected by a sprocket chain 117 'with a sprocket wheel 118 on the shaft 40 and the former is connected by means of a sprocket chain 119 with a sprocket wheel 120 on the shaft 113. By this arrangement it is obvious that the shaft 106 will be rotated whenever the shaft 40 is rotated regardless of the position of the frame 105, that is to say, said frame 105 may freely swing in a horizontal plane without in any way affecting the gearing device that connects the shaft 106 with the shaft 40.

Pivoted to the frame 105 is the conveyer ends of the conveyerchute a hinge joint 126 so arranged as to permit the outer end to fold upwardly over the inner end.

I have provided for adjusting the conreyer chute to any desired position of adj ustment and also for folding it to position for transportation as follows: Referring to Fig. 21 of the drawings, T have used the reference numeral 127 to indicate a beam having two supporting wheels 128 mounted thereon in line with the beam to which they are at tached. Pivoted on top of the beam 127 is a hinge member 129 clearly shown in Figs. 8, 9, and 10, and having an upwardly extending lug 130 at its forward end. The other hinge member 131 normally rests on top of the hinge member 129 and may be securely clamped thereto by means of the set-screw 132 passed through the lug 130 and into the hinge member 131. On top of the hinge member 131 are two lugs 133 pivotally connected by means of the bolt 134 with a second beam 135, said second beam being free to tilt on the belt 134. in order to adjust the beam 135 to a horizontal position independent of the position of the lower beam, 1 have provided on each end of the upper beam two brackets 136 with a screw 137 mounted therein and provided with a hand wheel 138 at its top The lower end of 'each screw is designed to enter between the rip-turned edges of a plate 139 on the lower beam. hdounted on top of the beam 135 is a stationary frame 1 10 and connected to'the beam 135 is an arm 1 11, pivotally mounted to the lower end of the bracket 102. A brace ion 142 is connected to the arm 1 11 and to the having their upper ends connected and pro vided with pulleys 14-5. Mounted uponthe arm 1 11 is a shaft 146 having a notched wheel 1 17 thereon, designed to be engaged by a pawl 1418 to hold said wheel against ro tation. Fixed to and wound upon the shaft 146 are the ends of a rope or cable 14-9. This ropev or cable extends upwardly over the pulleys 1 15 and then through an opening.

formed in the conveyer chute at a point spaced apart from the hinge joint 126 in a direction toward the delivery end of the chute. The arrangement of the parts just described is such that when the inner section of the conveyor chute is elevated above the upper beam, the uprights 144.- will rest against the rollers 1&3 as shown in Fig. .5.

and the rope or cable 149 will support the inner end'of the outer section in an elevated position because the greatest weight of the outer section is beyond the point where the rope or cable is attached to it, so that the two sections will thus be held in line and lee ' suming that the conveyer is in its folded up position as shown in Fig. 1, and assuming that it is desired to move it to its extended,

position, then the operator manipulates the shaft 116 and the rope or cable jointly elerates the uprights 14-1 and the outer end of the outer section until the uprights 1&1 strike upon the rollers 1&3. He then permits the shaft 116 to unwind andthus gradually lowers the outer section untilthe outer section passes a vertical line, whereupon'the weight of its outer end will cause the outer end of the inner section to be elevated to position I in line Wltll the outer section and then both sections may be jointly raised or lowered to the desired position. By means of the pawl 1418, the conveyer chute may be held in any position of its adjustment. I

I I have provided means for supporting the entire conveyer frame on the side of the machine frame for transportation as follows: I first remove the set-screw 132 and then swing the lower beam 127 to an inverted po' sition with the wheels 1528 extended upwardly. I then swing the lower beam to position at right-angles to the upper beam and support it in this position by means of a hook 150 arranged to engage a pin 151 on thelower beam as shown in Fig. 22. Mounted on the side ofthe main frame in suitable brackets 152 is an upright shaft 153, screw threaded at its upper end, and having its lower end extended horizontally to form a support 1541-. .l /Iounted above the upper bracket 152 is a screw threaded hand wheel 155. The support 15 1 may be swung along side of the mainframe, or project out from the main frame. Then this support is swung out, the conveyer frame is moved to position above it. Then the operator manipbracket ulates the hand wheel 155 so that the extension 154: will engage the bottom of the conveyer frame as the shaft 153 moves upwardly and thusthe entire conveyer frame will be elevated and supported. The said arm 153 is prevented from swinging later ally when in an elevated position by means of a slot formed in the lower end of the 152 and designed to receive the extension 15 1 as clearly shown in Fig. 22.

At each side of the platform 54 are two hinge members 156' and 157. The hinge member 157 ,is provided with a slide-bolt keeper 158. Connected to the hinges 156 and 157 is a side-board 159 and mounted upon this side-board is a slide-bolt loop 160 havinga'slide-bolt 161 mounted therein and capable of entering the keeper 158 when the side-board is in avertical position. When the slide-bolt is withdrawn from the keeper 158, the sideboard may be folded down overthe top of the roller platform.

Having thus described all of the various features of the invention in turn, both structurally and functionally, it is believed that the operation of the entire machine as a whole will be readily understood.

I claim as my invention 1. In a machine of the class described, the combination of a frame, a tilting wagon platform pivotallymounted on said frame, a rock shaft mounted in said frame and having a depending crank sect1on capable of moving under the rear of the tilting platform, an upright member pivoted to the front end of said platform, a block con: nected to said upright member and having a screw-threaded opening therein, a screw shaft passing throughsaid block, an upright shaft, means for gearing said uprlght shaft to said screw shaft, power mechanlsm for rotating said upright shaft in either direction, a lever, and means connected with said lever for controlling the movement of said power mechanism, said controlling means being arranged to withdraw said crank section from beneath the rear. end of the tilting platform when the screw shaft is moved in a direction to lift the front end of said platform.

.2. In a machine of the class described, the combination of a frame, a tilting wagon platform pivotally mounted thereon, means for operating said platform about its point of pivot, mechanism'for locking said platform in horizontal position consisting of a rock shaft journaled in said frame and prodownwardly, a spring for normally holding said crank section in position under said platform, and means for simultaneously controlling said platform operating means and said locking mechanism.

3.111 a device of the class described, the combination of a frame, a tilting wagon platform pivotally mounted within said frame, a screw threaded shaft journaled upon said frame and operatively connected to said platform near one end on the underside thereof, power mechanism operatively connected to said shaft below saidplatform forv operating said shaft, and areversing mechanism below said platform for controlling the upward and downward move-- ment of said shaft, and a retaining means at the opposite end of said, platform for holding said platform in its normal position and a lever extending above said platform and operatively connected below said platform to said retaining means and said reversing mechanism, whereby said retaincombination of a frame, a tilting Wagon platform pivotally mounted thereon, means positioned below one end of said platform and connected with the underside thereof for raising and lowering said platform, a

reversing mechanism positioned below said platform for controlling said raising and lowering mechanism, a retaining member at the opposite end of said platform for holding said platform in its normal position and a lever operatively connected with said reversing mechanism and said retaining means whereby said reversing mechanism and said retaining means are simultaneously operated at the initial movement of either the raising or lowering operation.

In a machine of the class described, the combination of a frame, of a tilting platform pivotally mounted on said frame, a depending bracket carried by one end of said platform on the under side thereof, a block pivotally mounted Within said bracket,

, a stationary bracket carried by the frame and having a screw threaded shaft journaled therein, said block operating upon said 25 screw threaded shaft, and means below said platform for rotating the said shaft whereby the platform may be tilted.

6. In a machine of the class described,

the combinationwith the frame, a tilting 30 wagon platform pivotally mounted on said frame, a depending Ushaped bracket pivotally mounted upon one end of said platform,

a stationary lJ-shaped bracket carried by the frame, a screw threaded shaft journaled 35 within the extremities of the stationary a -shaped bracket, a block adapted to travel upon said shaft, means for pivotally mounting' said block within the lower end of the depending Fri-shaped bracket, and means for 49 rotating said screw'threaded shaft whereby the platform may be tilted in either Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Eatents, Washington, D. 0.